首页>
外国专利>
Phosphoric acid purification - by solvent extraction water washing of extract and back extraction with water
Phosphoric acid purification - by solvent extraction water washing of extract and back extraction with water
展开▼
机译:磷酸纯化-通过溶剂萃取水洗涤萃取液并用水反萃取
展开▼
页面导航
摘要
著录项
相似文献
摘要
Prodn. of phosphoric acid with reduced inorg. impurities from crude phosphoric acid obtd. by decompsn. of an ore of phosphorus with sulphuric acid comprises extracting the crude acid with a 6-8C alkanol (I), washing the extra =4 times with water opt. contg. phosphoric acid, the total amt.of washing water beeing 20-50 pts. wt. per 100 pts. wt. phosphoric acid contained in the extract, and back extracting the washed extract with water to obtain aq. phosphoric acid with reduced inorg. impurities, which if desired may subsequently be concd. Pred. (I) is 3 or 5 methylhexanol. The process is simple and avoids the use of expensive metals. such as ion exchange resins.
展开▼